TWI625563B - Plastic barrel, camera module and electronic device - Google Patents

Abstract

A plastic lens barrel includes an object end portion, a base portion, and a tubular portion. The object end portion includes an object end outer surface, an object end opening, and an object end inner edge surface. A part of the inner edge surface of the object end is connected to the outer surface of the object end and opens a hole around the object end. The base portion includes a base bottom surface, a base opening, and an outer side surface of the base. The bottom surface of the base surrounds the opening of the base and is connected to the outer side of the base. The base portion further includes at least three material removal marks, which are obtained by partially removing at least three material injection portions. The tubular portion connects the object end portion and the base portion, and includes a plurality of inner edge surfaces. When certain conditions are met, the flatness of the bottom surface of the base can be ensured.

Description

Plastic lens barrel, camera module and electronic device

The invention relates to a plastic lens barrel, a camera module and an electronic device, and more particularly to a portable electronic device and a plastic lens barrel and a camera module applied to the same.

With the popularization of personal electronics and mobile communication products equipped with imaging devices such as mobile phones and tablets, the rise of miniaturized lens modules has also led to the demand for miniaturized lens modules with high resolution and excellent imaging quality. It also climbed sharply.

The plastic lens barrel is usually used to carry the lenses in the lens module and provide the optical distance between any two lenses. The structure of the plastic lens barrel affects the imaging quality of the lens module.

Most of the conventional plastic lens barrels are assembled on the electronic photosensitive elements by screws, and this assembly process often results in the generation of dust. In addition, when the screw axis is not correct, the assembled lens will also be skewed, which will affect the imaging quality.

In order to solve this problem, plastic lens barrels with a base portion connected to a photosensitive element have appeared in the market. However, due to the current process, The surface of the part facing the electronic photosensitive element is relatively flat, so the problem of skew of the assembled lens may still be caused, and the assembly tolerance may also have a negative impact on the position of the back focus light.

The invention provides a plastic lens barrel, a camera module and an electronic device, wherein a base portion of the plastic lens barrel includes a material removal mark left after being removed by at least three injection parts. By setting the injection part on the base part, it can help the injection material to flow smoothly during the injection molding process, and then more ideally control the dimensional accuracy of the base part and ensure the flatness of the bottom surface of the base. . In addition, the design of at least three injection parts can help mold plastic lens barrels with more complicated structures. In addition, each injection part also has a material removal mark remaining after the injection part is partially removed, which can make the cutting and clamping operations of parts faster, so the cutting tool and the gripper can be clamped. The arms are designed together to increase shear efficiency.

The invention provides a plastic lens barrel, which includes an object end portion, a base portion and a tubular portion. The object end portion includes an object end outer surface, an object end opening, and an object end inner edge surface. A part of the inner edge surface of the object end is connected to the outer surface of the object end and opens a hole around the object end. The base portion includes a base bottom surface, a base opening, and an outer side surface of the base. The bottom surface of the base surrounds the opening of the base and is connected to the outer side of the base. The base portion further includes at least three material removal marks, which are obtained by partially removing at least three material injection portions. The tubular portion connects the object end portion and the base portion, and includes a plurality of inner edge surfaces. The area of the bottom surface of the base is As, and the diameter of the opening of the base is ψ o, which meets the following conditions: 0.19 <As / Ao <1.5, where Ao = π × (ψ o / 2) ² . This can help to more ideally control the dimensional accuracy of the base portion and ensure the flatness of the bottom surface of the base.

In one embodiment, the object end portion, the base portion and the tubular portion may be a black plastic body integrally formed by injection molding. The shape of the base portion may be different from the shape of the base opening. The area of the bottom surface of the base is As, and the diameter of the base opening is ψ o, which can satisfy the following conditions: 0.34 <As / Ao <1.2, where Ao = π × (ψ o / 2) ² . The height of the parallel central axis of the plastic lens barrel is H, and the thickness of the parallel central axis of the base portion is h1, which can satisfy the following conditions: 0.04 <h1 / (H-h1) <0.5. The outer side of the base may include at least four sides, each side includes two ends, and the ends of each two adjacent sides are connected to each other. The plurality of material removal marks may be respectively located on the plurality of side surfaces, and each of the material removal marks may be closer to one of two ends of each side surface. The plastic lens barrel can be a screw-free structure. The area of the bottom surface of the base is As, and the diameter of the opening at the object end is ψ d, which can satisfy the following conditions: 0.8 <As / (π × (ψ d) ² ) <3.6. The diameter of the object-end opening is ψ d, and the height of the plastic lens barrel parallel to the central axis is H, which can satisfy the following conditions: 1.02 <H / ψ d <2.8. The plurality of inner edge faces of the tubular portion may form at least six parallel inner edge faces. The diameter of the opening of the base is ψ o, and the height of the plastic lens barrel parallel to the central axis is H, which can satisfy the following conditions: 1.05 <ψ o / H <2.5. The area of the bottom surface of the base is As, and the diameter of the opening at the object end is ψ d, which can satisfy the following conditions: 1.0 <As / (π × (ψ d) ² ) <3.15. The diameter of the object-end opening is ψ d, and the height of the plastic lens barrel parallel to the central axis is H, which can meet the following conditions: 1.32 <H / ψ d <2.42. With the technical features of the points mentioned above, it helps to improve the efficiency of injection molding and the molding quality of each component.

The invention provides a camera module, which includes the plastic lens barrel and an optical lens group arranged in the plastic lens barrel. In an embodiment, the object-side opening may be an aperture of an optical lens group. This can reduce the camera module The complexity of the structure can be eliminated without using an additional light-shielding element as the aperture.

The invention provides an electronic device including the camera module and an electronic photosensitive element connected to the camera module. This can simplify the manufacturing process of the camera module and save costs.

In one embodiment, the electronic photosensitive element can be mounted on the substrate, the plastic lens barrel can be mounted on the substrate, and the bottom surface of the base can be received on the substrate and on the same side as the electronic photosensitive element. The plurality of sides of the plastic lens barrel may form four corners, and one of the plurality of corners may be a chamfer. Thereby, the adhesion position of the plastic lens barrel and the substrate can be avoided.

100, 200, 300‧‧‧ plastic lens barrel

110, 210, 310‧‧‧ ends

112, 212, 312‧‧‧ object outer surface

114, 214, 314‧‧‧ openings

116, 216, 316‧‧‧ inside edge

120, 220, 320‧‧‧ Tubular

121, 122, 123, 124, 125, 126, 221, 222, 223, 224, 225, 226, 321, 322, 323, 324, 325, 326

121a, 122a, 221a, 222a, 321a, 322a

130, 230, 330‧‧‧ base

131, 231, 331‧‧‧ bottom surface of base

132, 232, 332‧‧‧ opening of base

133, 233, 333‧‧‧ Outside of base

133_1, 133_2, 133_3, 133_4, 233_1, 233_2, 233_3, 233_4, 333_1, 333_2, 333_3, 333_4‧‧‧ side

134, 234, 334‧‧‧

135, 235, 335‧‧‧‧Injection Department

140‧‧‧mould

141‧‧‧ chamber

142‧‧‧ shot out of the runner

143‧‧‧Gated gate

150, 250, 350‧‧‧ central axis

160_1, 160_2, 160_3, 160_4, 260_1, 260_2, 260_3, 260_4, 360_1, 360_2, 360_3, 360_4, 510_1‧‧‧ corner

400‧‧‧ camera module

410‧‧‧Optical lens set

410_1, 410_2, 410_3, 410_4‧‧‧ lens

510‧‧‧ substrate

515‧‧‧Electronic photosensitive element

331_1‧‧‧Plane Department

331_2‧‧‧ Depression

E1, E2‧‧‧

H‧‧‧ height of plastic lens barrel parallel to central axis

h1‧‧‧Thickness of the base part parallel to the central axis

ψ o‧‧‧ diameter of base opening

ψ d‧‧‧ diameter

As‧‧‧area

Ah‧‧‧ cross-sectional area

Ao‧‧‧ cross-sectional area

FIG. 1A is a schematic diagram of a plastic lens barrel according to the first embodiment of the present invention.

FIG. 1B is another schematic diagram of the plastic lens barrel according to the first embodiment of the present invention.

FIG. 1C is a side sectional view of a plastic lens barrel according to the first embodiment of the present invention.

FIG. 1D is a schematic diagram showing a parameter As in the first embodiment of the present invention.

Figure 1E is a sectional view of a mold used in the manufacturing process of the plastic lens barrel according to Figure 1A.

FIG. 1F is a top view of a plastic lens barrel according to the first embodiment of the present invention.

FIG. 1G is a bottom view of the plastic lens barrel according to the first embodiment of the present invention.

FIG. 2A is a schematic diagram of a plastic lens barrel according to a second embodiment of the present invention.

FIG. 2B is a side sectional view of a plastic lens barrel according to a second embodiment of the present invention.

FIG. 2C is a schematic diagram showing the parameter As in the second embodiment of the present invention.

FIG. 2D is a top view of a plastic lens barrel according to a second embodiment of the present invention.

FIG. 2E is a bottom view of the plastic lens barrel according to the second embodiment of the present invention.

FIG. 3A is a schematic diagram of a plastic lens barrel according to a third embodiment of the present invention.

FIG. 3B is another schematic view of the plastic lens barrel according to the third embodiment of the present invention.

FIG. 3C is a side sectional view of a plastic lens barrel according to a third embodiment of the present invention.

FIG. 3D is a schematic diagram of a parameter As according to a third embodiment of the present invention.

FIG. 3E is a top view of a plastic lens barrel according to a third embodiment of the present invention.

FIG. 3F is a bottom view of the plastic lens barrel according to the third embodiment of the present invention.

FIG. 4 is a schematic diagram of a camera module according to a fourth embodiment of the present invention.

FIG. 5A is an exploded view of an electronic device according to a fifth embodiment of the present invention.

FIG. 5B is a side cross-sectional view of the electronic device according to the fifth embodiment shown in FIG. 5A.

FIG. 5C is a schematic diagram of the assembled electronic device according to the fifth embodiment shown in FIG. 5A.

<First Embodiment>

FIG. 1A is a schematic diagram of a plastic lens barrel 100 according to a first embodiment of the present invention; FIG. 1B is another schematic diagram of a plastic lens barrel 100 according to a first embodiment of the present invention; FIG. 1C is a schematic view according to the present invention A side sectional view of the plastic lens barrel 100 shown in the first embodiment. As can be seen from FIGS. 1A to 1C, the plastic lens barrel 100 includes an object end portion 110, a tubular portion 120, and a base portion 130. The object-end portion 110 includes an object-end outer surface 112, an object-end opening 114, and an object-end inner edge surface 116. A part of the object-end inner edge surface 116 is connected to the object-end outer surface 112 and surrounds the object-end opening 114. The base portion 130 may include a base bottom surface 131, a base opening 132, and a base outer side surface 133. The base bottom surface 131 surrounds the base opening 132 and is connected to the base side surface 133.

The tubular portion 120 connects the object end portion 110 and the base portion 130, and includes a plurality of inner edge surfaces 121, 122, 123, 124, 125, and 126. The inner edge surfaces 121 to 126 of the tubular portion 120 may form at least six parallel surfaces. The inner edge surfaces (for example, the parallel inner edge surfaces 121 a and 122 a) are used to avoid affecting the injection quality of the object end portion 110 due to the excessive thickness of a local area of the tubular portion 120. Specifically and In other words, as shown in FIG. 1C, in the first embodiment, six parallel inner edge surfaces are located on the inner edge surfaces 121 to 126, respectively. Therefore, by appropriately allocating the plurality of parallel inner edge surfaces, it is possible to help the injection material flow more smoothly in the injection molding process.

In conjunction with FIG. 1D, it illustrates a schematic diagram of the parameter As in the first embodiment of the present invention. As can be seen from FIG. 1C and FIG. 1D, the area of the base bottom surface 131 is As, and the diameter of the base opening 132 is ψ o, which can satisfy the following conditions: 0.19 <As / Ao <1.5, where Ao = π × (ψ o / 2) ² , which is the cross-sectional area of the base opening 132. It can be seen from FIG. 1D that the cross-sectional area of the base portion 130 is Ah, that is, the area surrounded by the outer side surface 133 of the base, and the area As of the base bottom surface 131 can be deducted from the cross-sectional area of the base portion 130 by the base opening 132. The cross-sectional area (that is, As = Ah-Ao) is calculated, but it is not limited thereto. Thereby, the flatness of the base bottom surface 131 can be ensured. Preferably, the following conditions can be satisfied: 0.34 <As / Ao <1.2. Therefore, a better balance can be achieved between the flatness of the base bottom surface 131 and the miniaturization of the plastic lens barrel 100.

As can be seen from FIG. 1A, the base portion 130 further includes at least three material removal marks 134, which can be obtained by partially removing at least three material injection portions 135.

With reference to FIG. 1E, a sectional view of the mold 140 used in the manufacturing process of the plastic lens barrel 100 according to FIG. 1A is shown. It can be seen from FIG. 1E that during the injection molding process of the plastic lens barrel 100, the injection material is injected into the cavity 141 in the mold 140 through the injection channel 142, and a molding gate 143 is provided between the injection channel 142 and the cavity 141. This corresponds to the cutout mark 134 of the base portion 130 described above. After the injection molding is solidified and separated from the mold 140, the position of the molding gate 143 corresponding to the base portion 130 will leave residual solidified material, that is, the injection 料 部 135。 Material section 135. Next, after the material injection portion 135 is further removed, a material removal mark 134 is formed on the base portion 130. Due to the design of the molding gate 143, the connection between the injection portion 135 and the base portion 130 is formed into a lowered shape, so that after the injection portion 135 is removed, the corresponding removal mark 134 on the base portion 130 will not be removed. Affects its dimensional accuracy or hinders its subsequent assembly applications. Therefore, by forming the injection part 135 on the base part 130, it is possible to help the injection material flow smoothly during the injection molding process, and then more ideally control the dimensional accuracy of the base part 130 and ensure The flatness of the base bottom surface 131.

Due to the angle of the sectional view, FIG. 1E shows only one molding gate 143, but at least three material removal marks 134 of the injection molding FIG. 1A are obtained by partially removing at least three injection parts 135, so the mold 140 has at least three molding gates 143 corresponding to at least three injection parts 135. This can help mold plastic lens barrels with more complex structures. In addition, the at least three material removal marks 134 can make the cutting operation and the clamping operation of the plastic lens barrel 100 faster, so the cutting tool and the gripper arm of the clamping machine can be designed together to improve the cutting efficiency.

In the first embodiment, the object end portion 110, the base portion 130, and the tubular portion 120 of the plastic lens barrel 100 may be a black plastic body integrally formed by injection molding, but the plastic lens barrel 100 of the present invention is not limited thereto. . As a result, the number of parts used to make the plastic lens barrel 100 can be reduced, and the problem of torque traditionally caused by assembling various plastic parts and the dust problem caused by friction between the plastic parts can be eliminated correspondingly. In addition, by controlling the accuracy of the mold 140, the problem of the screw shaft misalignment that must be reviewed when using a conventional screw structure can be eliminated.

1B and 1D, it can be seen that the The shape (for example, a rectangle) is different from the shape (for example, a circle) of the base opening 132. In this case, a certain structural thickness of the base portion 130 can be maintained, thereby preventing the injection molding process from being hindered due to the small volume of the base portion 130, but the shape of the base portion 130 is not limited here, in other cases The shape of the lower base portion 130 may be a circle with a cut edge, and the diameter of the circle is larger than the diameter of the base opening 132.

As can be seen from FIGS. 1A and 1C, the height of the plastic lens barrel 100 parallel to the central axis 150 (that is, the optical axis) is H, and the thickness of the base portion 130 parallel to the central axis 150 is h1, which can satisfy the following conditions: 0.04 < h1 / (H-h1) <0.5. This can prevent the molding quality of the object-end opening 114 from being hindered due to the structural thickness of the base portion 130 being too large.

Therefore, the plastic lens barrel 100 of the present invention can be implemented as a screwless structure. Since it is not necessary to design the screw teeth, the development time of the mold 140 can be reduced, thereby improving production efficiency.

Please refer to FIG. 1F and FIG. 1G, which are a top view and a bottom view of the plastic lens barrel 100 according to the first embodiment of the present invention, respectively. As can be seen from Figures 1F and 1G, the outer side surface 133 of the base includes at least four side surfaces 133_1, 133_2, 133_3, and 133_4, each side surface 133_1 ~ 133_4 includes two ends E1 and E2, and each two adjacent side surfaces 133_1 The ends of ~ 133_4 are connected to each other. In this way, it can help to design the runner route of the injection material in the injection molding mold. In addition, the sides 133_1 to 133_4 may form four corners 160_1 to 160_4, and the corners 160_1 may be chamfered.

In addition, the material removal marks 134 are respectively located on the side surfaces 133_1 to 133_4, and each material removal mark 134 is closer to the two ends E1 of each side surface 133_1 to 133_4. And one end of E2 (for example, end E1). This can reduce the occurrence of uneven injection of the plastic lens barrel 100 formed at a thinner thickness. In addition, when the injection speed is fast, it is also possible to avoid the occurrence of residual stresses caused by the plastic in the plastic lens barrel 100 after cooling due to reducing the occurrence of excessive local cooling gradients. In addition, it can further reduce the occurrence of short shots or sink marks on the bottom surface 131 of the molded base, thereby facilitating the cutting of the plastic lens barrel 100 and enabling the cutting injection portion 135 to be cut. Machines operate more efficiently.

Please refer to FIG. 1C again. The area of the bottom surface 131 of the base is As, and the diameter of the object-side opening 114 is ψ d, which meets the following conditions: 0.8 <As / (π × (ψ d) ² ) <3.6. This can help ensure the molding quality of the object-end opening 114.

The diameter of the object-end opening 114 is ψ d, and the height of the plastic lens barrel 100 parallel to the central axis 150 is H, which satisfies the following conditions: 1.02 <H / ψ d <2.8. Accordingly, the plastic lens barrel 100 can be designed to fit an optical system having a large aperture and a short total length. Preferably, the following conditions can be satisfied: 1.32 <H / ψ d <2.42. Therefore, the plastic lens barrel 100 can be applied to a lens barrel design with a large light-entry opening and a short focal length.

The diameter of the base opening 132 is ψ o, and the height of the plastic lens barrel 100 parallel to the central axis 150 is H, which can satisfy the following conditions: 1.05 <ψ o / H <2.5. Thereby, the flow of plastic can be facilitated, and the ejection channels corresponding to the at least three injection parts 135 can be more evenly distributed to avoid excessive concentration.

The area of the base bottom surface 131 is As, and the diameter of the object-side opening 114 is ψ d, which can satisfy the following conditions: 1.0 <As / (π × (ψ d) ² ) <3.15. In this way, it is possible to prevent the object-end opening 114 from being too small or the area of the base bottom surface 131 from being too large, thereby reducing defective products and improving the efficiency of injection molding.

Please refer to Table 1 below, which lists the data defined by the plastic lens barrel 100 according to the foregoing parameters of the first embodiment of the present invention, and is shown in FIG. 1C and FIG. 1D.

<Second Embodiment>

FIG. 2A is a schematic view of a plastic lens barrel 200 according to a second embodiment of the present invention; FIG. 2B is a side sectional view of the plastic lens barrel 200 according to the second embodiment of the present invention. As can be seen from FIGS. 2A and 2B, the plastic lens barrel 200 includes an object end portion 210, a tubular portion 220, and a base portion 230. The object end portion 210 includes an object end outer surface 212, an object end opening 214, and an object end inner edge surface 216. A part of the object-end inner edge surface 216 is connected to the object-end outer surface 212 and surrounds the object-end opening 214. The base portion 230 may include a base bottom surface 231, a base opening 232, and a base outer side surface 233. The base bottom surface 231 surrounds the base opening 232 and is connected to the base side surface 233.

The tubular portion 220 connects the end portion 210 and the base portion 230, and includes a plurality of inner edge surfaces 221, 222, 223, 224, 225, and 226. The inner edge surfaces 221 to 226 of the tubular portion 220 may form at least six parallel surfaces. Inner edge surfaces (for example, parallel inner edge surfaces 221a and 222a). Specifically, as shown in FIG. 2B, in the second embodiment, the six parallel inner edge surfaces are located on the inner edge surfaces 221 to 226, respectively.

As can be seen from FIG. 2A, the base portion 230 may further include at least three material removal marks 234, which may be obtained by partially removing at least three material injection portions 235. For the manner of forming the at least three material removal marks 234, reference may be made to the related description in FIG. 1E, and details are not described herein again. This can help mold plastic lens barrels with more complex structures. In addition, the at least three material removal marks 234 can make the cutting operation and the clamping operation of the plastic lens barrel 200 faster, so the cutting tool and the gripper arm of the clamping machine can be designed together to improve the cutting efficiency.

In the second embodiment, the object end portion 210, the base portion 230, and the tubular portion 220 of the plastic lens barrel 200 may be a black plastic body integrally formed by injection molding.

With reference to FIG. 2C, a schematic diagram of the parameter As in the second embodiment of the present invention is shown. As can be seen from FIG. 2C, the shape (for example, a rectangle) of the base portion 230 is different from the shape (for example, a circle) of the base opening 232. In addition, in the second embodiment, the plastic lens barrel 200 has a screwless structure.

Please refer to FIG. 2D and FIG. 2E, which are a top view and a bottom view of the plastic lens barrel 200 shown in accordance with the second embodiment of the present invention, respectively. As can be seen from Figures 2C and 2D, the outer side surface 233 of the base includes at least four side surfaces 233_1, 233_2, 233_3, and 233_4, each side surface 233_1 ~ 233_4 includes two ends E1 and E2, and each two adjacent side surfaces 233_1 The ends of ~ 233_4 are connected to each other. In this way, it can help to design the runner route of the injection material in the injection molding mold. In addition, the material removal marks 234 are respectively located on the side surfaces 233_1 to 233_4, and each material removal mark 234 is closer to one of the two ends E1 and E2 (for example, the end E1) of each side surface 233_1 to 233_4.

With reference to FIG. 2A, FIG. 2B, and FIG. 2C, it can be known that in the second embodiment, the area of the base bottom surface 231 is As, and the cross-sectional area of the base portion 230 is Ah, that is, surrounded by the outer side surface 233 of the base. And the area As of the base bottom surface 231 can be calculated by subtracting the cross-sectional area of the base opening 232 (that is, As = Ah-Ao) from the cross-sectional area of the base portion 230. The diameter of the base opening 232 is ψ o, where Ao = π × (ψ o / 2) ² , that is, the cross-sectional area of the base opening 232. The height of the plastic lens barrel 200 parallel to the central axis 250 (that is, the optical axis) is H, the thickness of the base portion 230 parallel to the central axis 250 is h1, and the diameter of the object-end opening 214 is ψd. Please also refer to the second list below, which lists the data defined by the plastic lens barrel 200 according to the foregoing parameters according to the second embodiment of the present invention, and is shown in FIG. 2A, FIG. 2B, and FIG. 2C.

<Third Embodiment>

FIG. 3A is a schematic diagram of a plastic lens barrel 300 according to a third embodiment of the present invention; FIG. 3B is another schematic diagram of a plastic lens barrel 300 according to a third embodiment of the present invention; A side sectional view of the plastic lens barrel 300 shown in the three embodiments. As can be seen from FIGS. 3A to 3C, the plastic lens barrel 300 includes an object end portion 310, a tubular portion 320, and a base portion 330. The object end portion 310 includes an object end outer surface 312, an object end opening 314, and an object end inner edge surface 316. A part of the object-end inner edge surface 316 is connected to the object-end outer surface 312 and surrounds the object-end opening 314. The base portion 330 may include a base bottom surface 331, a base opening 332, and a base outer side surface 333. The base bottom surface 331 includes a flat portion 331_1 and a concave Depression 331_2. The recessed portion 331_2 surrounds the base opening 332, and the flat portion 331_1 surrounds the recessed portion 331_2 and is connected to the outer side surface 333 of the base.

The tubular portion 320 connects the object end portion 310 and the base portion 330, and includes a plurality of inner edge surfaces 321, 322, 323, 324, 325, and 326. The inner edge surfaces 321 to 326 of the tubular portion 320 may form at least six parallel surfaces. Inner edge surfaces (for example, parallel inner edge surfaces 321a and 322a). Specifically, as shown in FIG. 3C, in the third embodiment, the six parallel inner edge surfaces are located on the inner edge surfaces 321 to 326, respectively.

As can be seen from FIG. 3A, the base portion 330 can further include at least three material removal marks 334, which can be obtained by partially removing at least three material injection portions 335. For the manner of forming the at least three material removal marks 334, reference may be made to the related description in FIG. 1E, and details are not described herein again. This can help mold plastic lens barrels with more complex structures. In addition, at least three material removal marks 334 can make the cutting operation and the clamping operation of the plastic lens barrel 300 faster, so the cutting tool and the gripper arm of the clamping machine can be designed together to improve the cutting efficiency.

In the third embodiment, the object end portion 310, the base portion 330, and the tubular portion 320 of the plastic lens barrel 300 may be a black plastic body integrally formed by injection molding.

With reference to FIG. 3D, it is a schematic diagram showing a parameter As in the third embodiment of the present invention. As can be seen from FIG. 3D, the shape (for example, a rectangle) of the base portion 330 is different from the shape (for example, a circle) of the base opening 332. In addition, in the third embodiment, the plastic lens barrel 300 has a screw-free structure.

Please refer to FIG. 3E and FIG. 3F, which are respectively a top view and a bottom view of the plastic lens barrel 300 according to the third embodiment of the present invention. From Section 3E It can be seen in the figure and FIG. 3F that the outer side surface 333 of the base includes at least four side surfaces 333_1, 333_2, 333_3, and 333_4, each side surface 333_1 ~ 333_4 includes two ends E1 and E2, and each two adjacent side surfaces 333_1 ~ 333_4 Ends are connected to each other. In this way, it can help to design the runner route of the injection material in the injection molding mold. In addition, the material removal marks 334 are respectively located on the side surfaces 333_1 to 333_4, and each of the material removal marks 334 is closer to one of the two ends E1 and E2 of the side surfaces 333_1 to 333_4 (for example, the end E1).

With reference to FIGS. 3A, 3B, and 3C, it can be known that in the third embodiment, the area of the base bottom surface 331 is As, and the cross-sectional area of the base portion 330 is Ah, that is, surrounded by the outer side surface 333 of the base. And the area As of the base bottom surface 331 can be calculated by subtracting the cross-sectional area of the base opening 332 (that is, As = Ah-Ao) from the cross-sectional area of the base portion 330. The diameter of the base opening 332 is ψ o, where Ao = π × (ψ o / 2) ² , that is, the cross-sectional area of the base opening 332. The height of the plastic lens barrel 300 parallel to the central axis 350 (ie, the optical axis) is H, the thickness of the base portion 330 parallel to the central axis 350 is h1, and the diameter of the object-end opening 314 is ψd. Please also refer to the third table below, which lists the data defined by the plastic lens barrel 300 according to the foregoing parameters according to the third embodiment of the present invention, and is shown in FIG. 3A, FIG. 3B, FIG. 3C, and FIG. 3D.

<Fourth Embodiment>

With reference to FIG. 4, it illustrates a fourth embodiment according to the present invention. Schematic diagram of the camera module. As can be seen from FIG. 4, the camera module 400 includes a plastic lens barrel 100 and an optical lens group 410. The optical lens group 410 is disposed in the plastic lens barrel 100.

In the fourth embodiment, the plastic lens barrel 100 is the same as the first embodiment described above, and will not be described in detail here, but the plastic lens barrel of the camera module of the present invention may be but is not limited to the above embodiment.

In the fourth embodiment, the object-side opening 114 of the plastic lens barrel 100 is the aperture of the optical lens group 410, and the optical lens group 410 includes a plurality of lenses 410_1, 410_2, 410_3, and 410_4, which are respectively supported by a plurality of optical elements ( (Not otherwise labeled) to be disposed in the plastic lens barrel 100. Thereby, it is not necessary to additionally provide a light shielding element used as an aperture, thereby reducing the mechanism complexity of the camera module 400.

<Fifth Embodiment>

FIG. 5A is an exploded view of the electronic device 500 according to the fifth embodiment of the present invention; FIG. 5B is a side cross-sectional view of the electronic device 500 according to the fifth embodiment of FIG. 5A; The fifth embodiment is a schematic diagram of the assembled electronic device 500. As can be seen from FIG. 5A, FIG. 5B, and FIG. 5C, the electronic device 500 includes a camera module 400 and an electronic photosensitive element 515. The camera module 400 is the same as the fourth embodiment, and includes the plastic mirror of the first embodiment Tube 100, but not limited to this.

In detail, the electronic photosensitive element 515 can be mounted on the substrate 510, and can be mounted on the substrate 510 by aligning the corner 160_1 (ie, chamfering) of the plastic lens barrel 100 with the corner 510_1 on the substrate 510. With this, through The substrate 510 connects the electronic photosensitive element 515 with the camera module 400, and the configuration of the corner 160_1 can prevent the adhesion position of the camera module 400 and the substrate 510 from being wrong, so that its central axis 150 can align the center of the electronic photosensitive element 515 .

It can also be seen from FIG. 5A that the base bottom surface 131 can be received on the substrate 510 and on the same side as the electronic photosensitive element 515. In this case, the manufacturing process of the camera module 400 can be simplified, and the number of processes can be reduced to save machine costs.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Any person skilled in the art can make various modifications and retouches without departing from the spirit and scope of the present invention. Therefore, the protection of the present invention The scope shall be determined by the scope of the attached patent application.

Claims (19)

A plastic lens barrel includes: an object end including: an object end outer surface; an object end opening; and an object end inner edge surface, wherein a part of the object end inner edge surface is connected to the object end outer surface and A hole is formed around the object end; a base portion includes: a base bottom surface; a base opening; and an outer side surface of the base, wherein the base bottom surface surrounds the base opening and is connected with the outer side surface of the base, In addition, the base portion further includes at least three material removal marks, which are obtained by partially removing at least three injection portions; and a tubular portion connecting the object end portion and the base portion, which includes a plurality of inner edge surfaces; An area of the bottom surface of the base is As, and a diameter of the opening of the base is ψo, which satisfies the following conditions: 0.19 <As / Ao <1.5, where Ao = π × (ψo / 2) ² . The plastic lens barrel according to item 1 of the scope of the patent application, wherein the object end portion, the base portion and the tubular portion are a black plastic body integrally formed by injection molding. According to the plastic lens barrel described in item 2 of the scope of patent application, the shape of the base portion and the shape of the opening of the base are different. According to the plastic lens barrel described in item 2 of the scope of patent application, wherein the area of the bottom surface of the base is As, and the diameter of the opening of the base is ψo, which meets the following conditions: 0.34 <As / Ao <1.2, where Ao = π × (ψo / 2) ² . According to the plastic lens barrel described in item 2 of the scope of patent application, wherein the height of the plastic lens barrel parallel to a central axis is H, and the thickness of the base portion parallel to the central axis is h1, which satisfies the following conditions: 0.04 <h1 / (H-h1) <0.5. The plastic lens barrel according to item 2 of the scope of the patent application, wherein the outer side of the base includes at least four sides, each of the sides includes two ends, and the ends of the two adjacent sides are connected to each other. According to the plastic lens barrel described in item 6 of the scope of patent application, the material removal marks are respectively located on the side surfaces, and each of the material removal marks is closer to one end of the two ends of each side surface. The plastic lens barrel according to item 6 of the scope of patent application, wherein the plastic lens barrel has a screw-free structure. According to the plastic lens barrel described in item 8 of the scope of patent application, an area of the bottom surface of the base is As, and a diameter of the object-end opening is ψd, which satisfies the following conditions: 0.8 <As / (π × (ψd) ² ) <3.6. According to the plastic lens barrel described in item 3 of the scope of patent application, wherein the diameter of the opening at the object end is ψd, and the height of the plastic lens barrel parallel to a central axis is H, which meets the following conditions: 1.02 <H / ψd <2.8 . The plastic lens barrel according to item 3 of the scope of patent application, wherein the inner edge surfaces of the tubular portion form at least six parallel inner edge surfaces. According to the plastic lens barrel described in item 3 of the patent application scope, wherein the diameter of the opening of the base is ψo, and the height of the plastic lens barrel parallel to a central axis is H, which satisfies the following conditions: 1.05 <ψo / H <2.5. According to the plastic lens barrel described in item 3 of the scope of patent application, an area of the bottom surface of the base is As, and the diameter of the object-end opening is ψd, which satisfies the following conditions: 1.0 <As / (π × (ψd) ² ) <3.15. According to the plastic lens barrel described in item 3 of the scope of patent application, wherein the diameter of the object-end opening is ψd, and the height of the plastic lens barrel parallel to a central axis is H, which meets the following conditions: 1.32 <H / ψd <2.42 . A camera module includes: a plastic lens barrel according to item 1 of the scope of patent application; and an optical lens group disposed in the plastic lens barrel. The camera module according to item 15 of the patent application, wherein the object-end opening is an aperture of the optical lens group. An electronic device includes: the camera module according to item 15 of the scope of patent application; and an electronic photosensitive element connected to the camera module. The electronic device according to item 17 of the scope of patent application, wherein the electronic photosensitive element is mounted on a substrate, the plastic lens barrel is mounted on the substrate, and the bottom surface of the base is received on the substrate and is the same as the electronic photosensitive element side. According to the electronic device of claim 17 in the patent application scope, the sides of the plastic lens barrel form four corners, and one of the corners is a chamfer.